Abstract

Appliance read digital metre kwH represent an energy measuring instrument used for the measurement of ac electrics energi where its appearance have in the form of is digital. this digital metre kwH represent a[n appliance of pengkonversi of analogous metre kwH.
This Final duty study to regarding/ hit appliance pengkonversi of analogous metre kwH and will test-drive by at energy 900. System of this appliance is paired by analogous metre kwH a laser of point and of LDR to read saucer rotation, where both the component attached vertical with hole exist in saucer ( in this case without altering or unloading analogous metre kwH) and also make its appliance of him so that its appearance become digital KWH metre. To process data which enter hence needed by functioning MC AT89S51 as control system of appliance. Data exist in this digital metre kwH is data of kwH used metre, data of kwH monthly used metre of data and him assess used pulsa pursuant to rupiah per month. After happened 900 times saucer rotation hence data at analogous metre kwH will go up 1 kwH, because at saucer of kwH metre there are two hole, hence after twice laser of point penetrate hole and blocked saucer, digital metre kwH will go up 1 kwH so that data at digital metre kwH as according to data at analogous metre kwH.